聚-3,4-乙烯二氧噻吩导电聚合物纳米粒子的制备及性能

Preparation and Properties of Conducting Polymer Poly(3,4-ethylenedioxythiophene) Nanoparticles

采用反向胶束合成法,以二乙基磺基琥珀酸钠(AOT)形成的反胶束为模板制备了导电聚合物聚-3,4-乙烯二氧噻吩(PEDOT)纳米粒子.用紫外-可见-近红外光谱、红外光谱、X射线光电子能谱、扫描电子显微镜及透射电镜等手段对PEDOT粒子进行了表征.研究了纳米粒子的导电性能并采用石英微天平(QCM)对纳米粒子的气敏特性进行了分析,对相应导电机理及气体敏感机理进行了讨论.

Poly（3,4-ethylene dioxythiophene） （PEDOT） nanoparticles was prepared by reverse micelles technique. The nanoparticles were characterized by UV-Vis-near IR（UV-Vis-NIR） adsorption spectrum, IR spectrum, X-ray photoelectron（XPS）, scanning electron microscopy（SEM） and transmission electron microscopy （TEM）. The results confirmed that size distribution of this particle was 30--40 nm and the nanoparticles has been doped by Cl- during synthesis process. The conductivity of nanoparticles was investigated by four-probe and it has been found that this nanopartices showed higher conductivity （ 10. 2 S/cm） than conventional one. Furthermore, the gas sensitivity of nanoparticles deposited on quartz crystal microbalance（QCM） was studied and the nanopartices deposited device exhibited excellent sensitivity to NH3 gas at low concentration. The mechanism of conductivity and gas sensitivity of the nanoparticles are also included in this paper.